Finding the Fourth Proportional to 2,559.98, 3,530.71 and 1,720.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.98 : 3,530.71 = 1,720.42 : x
2. Step 2: Convert to fraction form
   2,559.98/3,530.71 = 1,720.42/x
3. Step 3: Cross multiply
   2,559.98x = 3,530.71 × 1,720.42
4. Step 4: Simplify right side
   2,559.98x = 6,074,304.10
5. Step 5: Solve for x
   x = 6,074,304.10/2,559.98
6. Step 6: Final answer
   x = 2,372.79